Spasmodic dysphonia (SD) is a neurological disorder caused by dystonia (abnormal sustained muscle contraction) of the vocal cords, hence also referred to as “laryngeal dystonia”. Depending on the ...

Spasmodic dysphonia (SD) is a rare neurological voice disorder characterized by involuntary spasms of the vocal cord muscles, leading to disrupted speech. The condition can manifest in different ...

Both have a rare speech disorder called spasmodic dysphonia. The treatable, but not curable, condition affects the vocal cords, according to the Cleveland Clinic. It can cause your voice to break ...